A Grove sensor designed for indoor air quality testing. 

DFRobot Gravity Analog TDS Total Dissolved Solids Sensor Meter 3.3~5.5V Compatible for Water Quality Testing

Arduino Nano 33 IoT with headers

SIM808 GSM/GPRS/GPS Bluetooth Compatible Development Board With GPS Antenna COM45 ,R17

Digital 1200X G1200 Microscope Electronic Video Microscope 7inch LCD 12MP Solder Phone Repair Magnifier Built-in Battery  

"Nextion NX8048T050 5 inch Resistive Touch Screen Man-machine interface HMI kernel

Nextion NX4024T032 3.2 Inch display Man-machine Interface HMI Touch Screen

MOD-TCA9548A CJMCU-9548 TCA9548A 1-to-8 I2C 8-Channel IIC Multiplexer

ARDUINO YUN REV 2 ABX00020 ATmega32U4 Development Board

ARDUINO UNO WiFi REV2

Arduino DUE 2013 (ARM 32 BIT- Cortex M3)

mini micro sd card reader module